Curing Time and Methods for the Plaster Base Layer of Exterior Wall Real Stone Paint

The base layer of exterior wall real stone paint is cement mortar plaster. During the setting process, it undergoes drying shrinkage and temperature-difference shrinkage. Improper exterior wall plastering can easily lead to hollowing and cracking. If cracks are not repaired before painting, they will gradually expand outward and cause the paint film to crack over time. Poor-quality real stone paint or improper application can also result in shrinkage and cracking after application, affecting the final performance.

Due to poor crack resistance or improper construction, exterior wall real stone paint may develop shrinkage cracks and other quality defects soon after application, especially after exposure to wind and sunlight. The mix ratio of cement mortar for exterior wall plastering must be appropriate, and construction must follow standard operating procedures. The exterior wall putty layer should only be applied after the plaster base has fully cured. Before putty application, the plaster layer must be inspected, and qualified paint must be used. The putty layer must be smooth, solid, clean, free of powdering, peeling, or other defects.

Climate and temperature must be considered during construction. Exterior emulsion paint can generally be applied when the outdoor temperature is above 5°C; only a few areas require temperatures above 10°C. Humidity is often overlooked by construction workers. Spraying should not be carried out when humidity exceeds 85% or immediately after rain, on damp walls or in humid environments.

For winter construction, workers should choose suitable weather to ensure proper film formation. Base treatment is crucial but often neglected after humidity control. Using low-strength putty can weaken the coating system and lead to later damage. Real stone paint is made from crushed colored minerals mixed with emulsion, without color paste, ensuring natural and stable color that does not fade.

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